./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:47:39,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:47:39,700 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:47:39,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:47:39,710 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:47:39,755 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:47:39,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:47:39,758 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:47:39,759 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:47:39,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:47:39,765 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:47:39,766 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:47:39,766 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:47:39,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:47:39,768 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:47:39,769 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:47:39,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:47:39,770 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:47:39,770 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:47:39,771 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:47:39,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:47:39,772 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:47:39,773 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:47:39,773 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:47:39,774 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:47:39,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:47:39,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:47:39,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:47:39,776 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:47:39,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:47:39,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:47:39,778 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:47:39,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:47:39,779 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:47:39,779 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:47:39,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:47:39,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:47:39,780 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:47:39,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:47:39,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:47:39,781 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:47:39,781 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f83ae5bec1717d6f197d4259600c0d1f406909832409df09253b7bf70d3f66fc [2023-11-06 22:47:40,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:47:40,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:47:40,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:47:40,115 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:47:40,115 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:47:40,117 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-06 22:47:43,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:47:43,395 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:47:43,395 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2023-11-06 22:47:43,405 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/data/603f6f5db/6f8beeeab9fe4e51a7ace7bb8b951b2f/FLAG68d0ed4e8 [2023-11-06 22:47:43,419 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/data/603f6f5db/6f8beeeab9fe4e51a7ace7bb8b951b2f [2023-11-06 22:47:43,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:47:43,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:47:43,425 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:47:43,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:47:43,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:47:43,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c12b8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43, skipping insertion in model container [2023-11-06 22:47:43,435 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,464 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:47:43,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:47:43,754 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:47:43,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:47:43,803 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:47:43,803 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:47:43,811 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:47:43,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43 WrapperNode [2023-11-06 22:47:43,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:47:43,813 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:47:43,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:47:43,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:47:43,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,876 INFO L138 Inliner]: procedures = 27, calls = 84, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 406 [2023-11-06 22:47:43,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:47:43,877 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:47:43,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:47:43,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:47:43,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,921 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:47:43,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:47:43,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:47:43,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:47:43,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (1/1) ... [2023-11-06 22:47:43,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:47:43,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:43,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:47:43,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:47:44,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:47:44,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:47:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:47:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:47:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:47:44,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:47:44,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:47:44,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:47:44,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:47:44,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:47:44,024 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:47:44,024 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:47:44,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:47:44,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:47:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:47:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:47:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:47:44,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:47:44,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:47:44,027 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:47:44,167 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:47:44,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:47:44,902 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:47:45,658 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:47:45,658 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-06 22:47:45,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:45 BoogieIcfgContainer [2023-11-06 22:47:45,661 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:47:45,664 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:47:45,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:47:45,668 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:47:45,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:43" (1/3) ... [2023-11-06 22:47:45,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434355a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:45, skipping insertion in model container [2023-11-06 22:47:45,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:43" (2/3) ... [2023-11-06 22:47:45,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434355a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:45, skipping insertion in model container [2023-11-06 22:47:45,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:45" (3/3) ... [2023-11-06 22:47:45,672 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-11-06 22:47:45,682 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:47:45,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:47:45,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-11-06 22:47:45,695 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:47:45,910 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:47:45,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 312 transitions, 652 flow [2023-11-06 22:47:46,167 INFO L124 PetriNetUnfolderBase]: 22/308 cut-off events. [2023-11-06 22:47:46,167 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:47:46,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 308 events. 22/308 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 320 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 259. Up to 2 conditions per place. [2023-11-06 22:47:46,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 312 transitions, 652 flow [2023-11-06 22:47:46,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 274 places, 282 transitions, 585 flow [2023-11-06 22:47:46,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:47:46,211 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 274 places, 282 transitions, 585 flow [2023-11-06 22:47:46,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 274 places, 282 transitions, 585 flow [2023-11-06 22:47:46,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 274 places, 282 transitions, 585 flow [2023-11-06 22:47:46,302 INFO L124 PetriNetUnfolderBase]: 21/282 cut-off events. [2023-11-06 22:47:46,302 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:47:46,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 282 events. 21/282 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 322 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 259. Up to 2 conditions per place. [2023-11-06 22:47:46,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 4384 [2023-11-06 22:48:06,215 INFO L134 LiptonReduction]: Checked pairs total: 6594 [2023-11-06 22:48:06,215 INFO L136 LiptonReduction]: Total number of compositions: 288 [2023-11-06 22:48:06,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:48:06,240 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@16607f71, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:48:06,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-11-06 22:48:06,243 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:48:06,244 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:48:06,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:48:06,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:06,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:48:06,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-06 22:48:06,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash 53281, now seen corresponding path program 1 times [2023-11-06 22:48:06,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:06,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383164222] [2023-11-06 22:48:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:06,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:06,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383164222] [2023-11-06 22:48:06,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383164222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:06,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:06,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:48:06,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922035143] [2023-11-06 22:48:06,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:06,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:48:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:48:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:48:06,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 600 [2023-11-06 22:48:06,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:06,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:06,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 600 [2023-11-06 22:48:06,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:12,424 INFO L124 PetriNetUnfolderBase]: 22655/28240 cut-off events. [2023-11-06 22:48:12,424 INFO L125 PetriNetUnfolderBase]: For 462/462 co-relation queries the response was YES. [2023-11-06 22:48:12,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56949 conditions, 28240 events. 22655/28240 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 146250 event pairs, 14596 based on Foata normal form. 0/8371 useless extension candidates. Maximal degree in co-relation 48897. Up to 27691 conditions per place. [2023-11-06 22:48:12,749 INFO L140 encePairwiseOnDemand]: 576/600 looper letters, 49 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2023-11-06 22:48:12,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 257 flow [2023-11-06 22:48:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:48:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:48:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 802 transitions. [2023-11-06 22:48:12,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44555555555555554 [2023-11-06 22:48:12,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 802 transitions. [2023-11-06 22:48:12,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 802 transitions. [2023-11-06 22:48:12,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:12,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 802 transitions. [2023-11-06 22:48:12,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,823 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 155 flow. Second operand 3 states and 802 transitions. [2023-11-06 22:48:12,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 257 flow [2023-11-06 22:48:12,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 244 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 22:48:12,874 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 184 flow [2023-11-06 22:48:12,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-11-06 22:48:12,881 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -14 predicate places. [2023-11-06 22:48:12,882 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 184 flow [2023-11-06 22:48:12,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:12,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:12,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:48:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:48:12,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-06 22:48:12,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1653253, now seen corresponding path program 1 times [2023-11-06 22:48:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:12,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137208165] [2023-11-06 22:48:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:13,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137208165] [2023-11-06 22:48:13,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137208165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:13,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385983836] [2023-11-06 22:48:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:13,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:13,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:13,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:48:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:13,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:48:13,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:13,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:13,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385983836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:13,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:13,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:48:13,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938571677] [2023-11-06 22:48:13,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:13,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:48:13,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:13,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:48:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:48:13,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 600 [2023-11-06 22:48:13,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 244.14285714285714) internal successors, (1709), 7 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:13,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:13,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 600 [2023-11-06 22:48:13,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:18,212 INFO L124 PetriNetUnfolderBase]: 22673/28267 cut-off events. [2023-11-06 22:48:18,213 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:48:18,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56568 conditions, 28267 events. 22673/28267 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 146081 event pairs, 14596 based on Foata normal form. 0/8390 useless extension candidates. Maximal degree in co-relation 56413. Up to 27691 conditions per place. [2023-11-06 22:48:18,461 INFO L140 encePairwiseOnDemand]: 587/600 looper letters, 46 selfloop transitions, 37 changer transitions 0/89 dead transitions. [2023-11-06 22:48:18,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 89 transitions, 470 flow [2023-11-06 22:48:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:48:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:48:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1793 transitions. [2023-11-06 22:48:18,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269047619047619 [2023-11-06 22:48:18,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1793 transitions. [2023-11-06 22:48:18,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1793 transitions. [2023-11-06 22:48:18,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:18,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1793 transitions. [2023-11-06 22:48:18,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 256.14285714285717) internal successors, (1793), 7 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 600.0) internal successors, (4800), 8 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,494 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 600.0) internal successors, (4800), 8 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,495 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 184 flow. Second operand 7 states and 1793 transitions. [2023-11-06 22:48:18,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 89 transitions, 470 flow [2023-11-06 22:48:18,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 89 transitions, 444 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:48:18,500 INFO L231 Difference]: Finished difference. Result has 66 places, 89 transitions, 414 flow [2023-11-06 22:48:18,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=66, PETRI_TRANSITIONS=89} [2023-11-06 22:48:18,501 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -7 predicate places. [2023-11-06 22:48:18,501 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 89 transitions, 414 flow [2023-11-06 22:48:18,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 244.14285714285714) internal successors, (1709), 7 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:18,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:18,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-06 22:48:18,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:18,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:18,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-06 22:48:18,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash 51252384, now seen corresponding path program 1 times [2023-11-06 22:48:18,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:18,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969207043] [2023-11-06 22:48:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:18,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:18,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969207043] [2023-11-06 22:48:18,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969207043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:18,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293865324] [2023-11-06 22:48:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:18,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:18,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:18,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:48:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:19,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:48:19,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:19,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:19,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293865324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:19,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:48:19,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-06 22:48:19,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000255903] [2023-11-06 22:48:19,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:19,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:48:19,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:19,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:48:19,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:48:19,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 600 [2023-11-06 22:48:19,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 89 transitions, 414 flow. Second operand has 5 states, 5 states have (on average 243.8) internal successors, (1219), 5 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:19,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:19,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 600 [2023-11-06 22:48:19,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:23,244 INFO L124 PetriNetUnfolderBase]: 22664/28255 cut-off events. [2023-11-06 22:48:23,244 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:48:23,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56578 conditions, 28255 events. 22664/28255 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 145751 event pairs, 14596 based on Foata normal form. 0/8392 useless extension candidates. Maximal degree in co-relation 56484. Up to 27682 conditions per place. [2023-11-06 22:48:23,641 INFO L140 encePairwiseOnDemand]: 590/600 looper letters, 51 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2023-11-06 22:48:23,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 475 flow [2023-11-06 22:48:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:48:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:48:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1280 transitions. [2023-11-06 22:48:23,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2023-11-06 22:48:23,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1280 transitions. [2023-11-06 22:48:23,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1280 transitions. [2023-11-06 22:48:23,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:23,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1280 transitions. [2023-11-06 22:48:23,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:23,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 600.0) internal successors, (3600), 6 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:23,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 600.0) internal successors, (3600), 6 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:23,670 INFO L175 Difference]: Start difference. First operand has 66 places, 89 transitions, 414 flow. Second operand 5 states and 1280 transitions. [2023-11-06 22:48:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 475 flow [2023-11-06 22:48:23,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 438 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-06 22:48:23,678 INFO L231 Difference]: Finished difference. Result has 65 places, 77 transitions, 336 flow [2023-11-06 22:48:23,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=65, PETRI_TRANSITIONS=77} [2023-11-06 22:48:23,681 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2023-11-06 22:48:23,681 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 77 transitions, 336 flow [2023-11-06 22:48:23,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.8) internal successors, (1219), 5 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:23,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:23,683 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:48:23,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:23,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:23,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-06 22:48:23,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2008951073, now seen corresponding path program 2 times [2023-11-06 22:48:23,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:23,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902328240] [2023-11-06 22:48:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:23,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902328240] [2023-11-06 22:48:24,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902328240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:24,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600785418] [2023-11-06 22:48:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:48:24,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:24,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:24,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:48:24,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:48:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:48:24,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:48:24,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:48:24,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:24,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600785418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:24,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:48:24,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-06 22:48:24,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037315435] [2023-11-06 22:48:24,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:24,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:48:24,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:24,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:48:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:48:24,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 600 [2023-11-06 22:48:24,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 77 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:24,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:24,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 600 [2023-11-06 22:48:24,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:28,178 INFO L124 PetriNetUnfolderBase]: 22664/28254 cut-off events. [2023-11-06 22:48:28,178 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:48:28,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56572 conditions, 28254 events. 22664/28254 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 145789 event pairs, 14596 based on Foata normal form. 1/8398 useless extension candidates. Maximal degree in co-relation 56488. Up to 27704 conditions per place. [2023-11-06 22:48:28,427 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 64 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-11-06 22:48:28,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 466 flow [2023-11-06 22:48:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:48:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:48:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 794 transitions. [2023-11-06 22:48:28,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411111111111111 [2023-11-06 22:48:28,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 794 transitions. [2023-11-06 22:48:28,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 794 transitions. [2023-11-06 22:48:28,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:28,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 794 transitions. [2023-11-06 22:48:28,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.6666666666667) internal successors, (794), 3 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,446 INFO L175 Difference]: Start difference. First operand has 65 places, 77 transitions, 336 flow. Second operand 3 states and 794 transitions. [2023-11-06 22:48:28,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 466 flow [2023-11-06 22:48:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 438 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:48:28,451 INFO L231 Difference]: Finished difference. Result has 63 places, 76 transitions, 310 flow [2023-11-06 22:48:28,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=76} [2023-11-06 22:48:28,454 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -10 predicate places. [2023-11-06 22:48:28,454 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 76 transitions, 310 flow [2023-11-06 22:48:28,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:28,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:28,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:28,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:28,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-06 22:48:28,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1118719696, now seen corresponding path program 1 times [2023-11-06 22:48:28,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:28,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592068450] [2023-11-06 22:48:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:28,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592068450] [2023-11-06 22:48:28,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592068450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:28,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:48:28,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:48:28,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116446431] [2023-11-06 22:48:28,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:28,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:48:28,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:48:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:48:28,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 600 [2023-11-06 22:48:28,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:28,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:28,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 600 [2023-11-06 22:48:28,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:33,129 INFO L124 PetriNetUnfolderBase]: 26128/33347 cut-off events. [2023-11-06 22:48:33,129 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:48:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67176 conditions, 33347 events. 26128/33347 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3040. Compared 192411 event pairs, 6649 based on Foata normal form. 0/10623 useless extension candidates. Maximal degree in co-relation 67120. Up to 21692 conditions per place. [2023-11-06 22:48:33,345 INFO L140 encePairwiseOnDemand]: 596/600 looper letters, 102 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-11-06 22:48:33,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 593 flow [2023-11-06 22:48:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:48:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:48:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 853 transitions. [2023-11-06 22:48:33,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738888888888889 [2023-11-06 22:48:33,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 853 transitions. [2023-11-06 22:48:33,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 853 transitions. [2023-11-06 22:48:33,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:33,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 853 transitions. [2023-11-06 22:48:33,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,359 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 310 flow. Second operand 3 states and 853 transitions. [2023-11-06 22:48:33,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 593 flow [2023-11-06 22:48:33,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 581 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:48:33,364 INFO L231 Difference]: Finished difference. Result has 64 places, 77 transitions, 312 flow [2023-11-06 22:48:33,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=64, PETRI_TRANSITIONS=77} [2023-11-06 22:48:33,367 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2023-11-06 22:48:33,368 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 77 transitions, 312 flow [2023-11-06 22:48:33,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:33,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:33,369 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-06 22:48:33,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:48:33,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-06 22:48:33,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1137369914, now seen corresponding path program 1 times [2023-11-06 22:48:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884649099] [2023-11-06 22:48:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:33,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:33,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884649099] [2023-11-06 22:48:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884649099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:33,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210853677] [2023-11-06 22:48:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:33,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:33,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:48:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:33,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:48:33,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:34,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:48:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:34,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210853677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:48:34,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:48:34,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:48:34,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678623792] [2023-11-06 22:48:34,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:48:34,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:48:34,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:48:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:48:34,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 600 [2023-11-06 22:48:34,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 77 transitions, 312 flow. Second operand has 13 states, 13 states have (on average 244.15384615384616) internal successors, (3174), 13 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:34,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:34,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 600 [2023-11-06 22:48:34,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:39,536 INFO L124 PetriNetUnfolderBase]: 26353/33806 cut-off events. [2023-11-06 22:48:39,536 INFO L125 PetriNetUnfolderBase]: For 1800/1800 co-relation queries the response was YES. [2023-11-06 22:48:39,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72102 conditions, 33806 events. 26353/33806 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 2953. Compared 195313 event pairs, 19471 based on Foata normal form. 12/12637 useless extension candidates. Maximal degree in co-relation 71891. Up to 33105 conditions per place. [2023-11-06 22:48:39,793 INFO L140 encePairwiseOnDemand]: 591/600 looper letters, 46 selfloop transitions, 61 changer transitions 0/113 dead transitions. [2023-11-06 22:48:39,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 748 flow [2023-11-06 22:48:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:48:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:48:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3034 transitions. [2023-11-06 22:48:39,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42138888888888887 [2023-11-06 22:48:39,806 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3034 transitions. [2023-11-06 22:48:39,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3034 transitions. [2023-11-06 22:48:39,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:48:39,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3034 transitions. [2023-11-06 22:48:39,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.83333333333334) internal successors, (3034), 12 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:39,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 600.0) internal successors, (7800), 13 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:39,833 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 600.0) internal successors, (7800), 13 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:39,834 INFO L175 Difference]: Start difference. First operand has 64 places, 77 transitions, 312 flow. Second operand 12 states and 3034 transitions. [2023-11-06 22:48:39,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 748 flow [2023-11-06 22:48:39,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 746 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:48:39,839 INFO L231 Difference]: Finished difference. Result has 80 places, 113 transitions, 740 flow [2023-11-06 22:48:39,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=740, PETRI_PLACES=80, PETRI_TRANSITIONS=113} [2023-11-06 22:48:39,840 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2023-11-06 22:48:39,840 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 113 transitions, 740 flow [2023-11-06 22:48:39,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 244.15384615384616) internal successors, (3174), 13 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:39,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:48:39,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:39,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:48:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:40,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2023-11-06 22:48:40,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:40,050 INFO L85 PathProgramCache]: Analyzing trace with hash -320565518, now seen corresponding path program 1 times [2023-11-06 22:48:40,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:40,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587095000] [2023-11-06 22:48:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:40,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:48:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587095000] [2023-11-06 22:48:40,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587095000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:48:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438719559] [2023-11-06 22:48:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:48:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:40,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:48:40,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_864fb368-25d9-4a4b-b9c6-a0750120f016/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:48:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:48:40,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:48:40,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:48:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:48:40,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:48:40,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438719559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:48:40,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:48:40,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2023-11-06 22:48:40,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358966873] [2023-11-06 22:48:40,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:48:40,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:48:40,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:48:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:48:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:48:40,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 600 [2023-11-06 22:48:40,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 113 transitions, 740 flow. Second operand has 4 states, 4 states have (on average 239.75) internal successors, (959), 4 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:40,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:48:40,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 600 [2023-11-06 22:48:40,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:48:46,427 INFO L124 PetriNetUnfolderBase]: 28375/36590 cut-off events. [2023-11-06 22:48:46,427 INFO L125 PetriNetUnfolderBase]: For 2110/2110 co-relation queries the response was YES. [2023-11-06 22:48:46,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77080 conditions, 36590 events. 28375/36590 cut-off events. For 2110/2110 co-relation queries the response was YES. Maximal size of possible extension queue 3118. Compared 215279 event pairs, 20920 based on Foata normal form. 228/14607 useless extension candidates. Maximal degree in co-relation 76883. Up to 33147 conditions per place.